Yeah the Xmega seems like a victim of.... something. Probably its early-day supply problems combined with the presence of ARM for higher-end options (although Arduino-wise, it's not like the Due is out yet... but ARM seems like a more appropriate use of the arduino team's effort than Xmega)

Yeah, old thread, not much activity. I'll post anyway, for posterity at least.

I recently added a github project for some code I developed nearly a year ago.

http://github.com/XMegaForArduino - XMega For Arduino github site

It already supports ATXMega64d4, and I'm working on support for ATXMega16e5, ATXMega32e5, ATXMega128A1,and ATXMega128A1U.

it folds into the arduino IDE without having to modify the IDE code, basically copy the files into the hardware/arduino tree (or use symlinks) and apply patches to 'boards.txt' and 'avrdude.conf' as needed to support the hardware. Includes compiler+tools patches for (older) FreeBSD ports, and the associated web page has debian and ubuntu packages for similar tools. I will be working on patches for more updated versions of gcc, binutils, and libc , particularly for e5 support.